Dr S Christopher assumed the charges of Secretary, Department of Defence Research & Development and DG, DRDO (redesignated as Chairman DRDO w.e.f 22 September 2016) with effect from 29th May 2015. Prior to this appointment he was Programme Director for the Airborne Early Warning and Control (AEW & C) and Director, Centre for Air-Borne Systems (CABS).
Dr Christopher obtained his BE (Hons) in Electronics & Communication Engineering from University of Madras and M.Tech from IIT, Kharagpur and his Ph.D. from IIT, Madras. He started his career as a Senior Engineer in M/s Bharat Electronics, Ghaziabad, before joining DRDO at LRDE as Scientist 'D'. He was elevated to the rank of Distinguished Scientist in 2012. Dr Christopher is a Fellow of the National Academy of Engineers (FNAE), Aeronautical Society of India (AeSI) and the Institution of Electronics & Telecommunication Engineers (IETE). He is a member of SEE, IEEE and is a recipient of many awards including Scientist of the Year Award in 1998.